小学科学苏教版四年级上册全册主要《知识点》汇总(2020新版) .pdfVIP

小学科学苏教版四年级上册全册主要《知

识点》汇总(2020新版)

XXXUnitOne:TheAnimalKingdom

1.logistsXXX:vertebratesandinvertebrates。basedon

whetherornottheyhaveabackbone.

2.Vertebratesincludemonkeys。geese。peacocks。

clownfish。dolphins。cats。elephants。andmore.

3.Invertebratesincludeants。snails。spiders。dragonflies。

jellyfish。earthworms。andmore.

4.Thespine。orvertebralcolumn。ismadeupofmany

vertebraeandservestosupportthetrunk。protectthespinalcord。

andenablemovement.

。

。

giantpanda。andSiberiantiger.

6.Fishsharecommoncharacteristicssuchasaspindle-shaped

bodywithscales。gillsforbreathing。finsforswimming。jaws

forfeeding。andtheXXX.

7.XXX.

8.Differentfinshavedifferentns。suchasthedorsalandanal

finsmaintainingbalance。thetailXXXthebodyforward。the

pectoralXXX。andtheXXX.

astheprimaryXXX.

XXX。feathers。wingsforflight。constantbody

temperature。andegg-laying.

11.Featherscanbedividedintoprimary。down。and

filoplumes.

12.PrimaryXXX。XXXwaterproof。XXXtemperature.

13.Downfeathersaresmallandsoft。cingXXX.

14.AbirdXXX。suchascatchingprey。tearing。filtering

foodfromwater。climbing。grooming。fighting。andbuilding

nests。Thebeaksshapeandsizearecloselyrelatedtothebirds

XXX.

15.Duckshavewebbedfeetwithapaddle-likestructureinthe

middle。whichhelpsthemwalkonlandandswiminwaterXXX.

16.EachbirdsXXX.

17.Mammalsarewarm-XXXtoliveyoungandhavehairor

XXX.

18.TheXXXkeepthemwarm.

19.XXX。suchasflying(bats)。running(horses)。jumping

(kangaroos)。andswimming(whales).

UnitTwo:n

1.Todetermineifanobjectisinn。wecanobservewhether

itsnrelativetoanotherobject(thereferencepoint)changes.